Author Topic: These eBay attenuators any good?  (Read 3586 times)

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Offline Alex EisenhutTopic starter

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These eBay attenuators any good?
« on: July 22, 2016, 11:54:44 pm »
http://www.ebay.com/itm/1dB-3dB-5dB-6dB-10dB-15dB-20dB-30dB-6GHz-2W-SMA-RF-Attenuator-/262176080490?hash=item3d0ae9826a:g:-zkAAOSwnipWYmWZ

There should be a "marketplace" section to discuss various experiences with sellers and their products...
Hoarder of 8-bit Commodore relics and 1960s Tektronix 500-series stuff. Unconventional interior decorator.
 

Offline AF6LJ

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Re: These eBay attenuators any good?
« Reply #1 on: July 24, 2016, 09:04:09 pm »
An SMA attenuator is hard to mess up in that frequency range.
Bot do take note the VSWR is okay but not great.
Sue AF6LJ
 
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Offline uncle_bob

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Re: These eBay attenuators any good?
« Reply #2 on: July 25, 2016, 12:03:58 am »
Hi

I think that for the price, I'd want to see a little more data. Is the attenuation +/- 1 db over the range? Is the VSWR 1.2 at 6 GHz and 1.05 below 3 GHz? Lots of things you might want to know.

Bob
 

Online ConKbot

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Re: These eBay attenuators any good?
« Reply #3 on: July 25, 2016, 02:29:51 am »
I doubt they are really good for 2w, they look like they are a bit smaller than minicircuits 1w attenuators. And +1 to a vswr vs freq and attenuation vs freq plot would be reassuring.   Since they make them, maybe they can provide them if you ask.
 

Offline AF6LJ

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Re: These eBay attenuators any good?
« Reply #4 on: July 25, 2016, 03:02:28 am »
What for $9.00?
They are dirt cheap....
Would I buy them to be used as test equipment?
Nope...
For a beginner and for use in a piece of gear I was building they are fine.
Sue AF6LJ
 

Offline cncjerry

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Re: These eBay attenuators any good?
« Reply #5 on: July 26, 2016, 04:27:39 am »
find one of the attenuators taken out of an HP SA for less than $50 and you can go from 10 - 70db with a battery and a few switches.  There are also attenuators in 1dB that are pulled from analyzers as well.
 

Offline uncle_bob

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Re: These eBay attenuators any good?
« Reply #6 on: July 26, 2016, 10:48:30 pm »
find one of the attenuators taken out of an HP SA for less than $50 and you can go from 10 - 70db with a battery and a few switches.  There are also attenuators in 1dB that are pulled from analyzers as well.

Hi

At least around here, surplus attenuators are a "sub $2" sort of thing when you find them for sale.

Bob
 

Offline Alex EisenhutTopic starter

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Re: These eBay attenuators any good?
« Reply #7 on: July 30, 2016, 04:28:06 pm »
Thanks all, but I'm such a hoarder I just found a box full of Huber Suhner SMA attenuators!  :-+
Hoarder of 8-bit Commodore relics and 1960s Tektronix 500-series stuff. Unconventional interior decorator.
 

Offline David Hess

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Re: These eBay attenuators any good?
« Reply #8 on: July 30, 2016, 05:56:12 pm »
At least around here, surplus attenuators are a "sub $2" sort of thing when you find them for sale.

The last time I visited the HAM swap meet around St. Louis which is hardly a hotbed of surplus electronics these days, I was happy to pick up an assortment of NOS Minicircuit SMA attenuators for $5 each.

I have a whole collection of used Tektronix BNC calibration attenuators from Ebay and they all tested good.

As far as these Chinese ones, $8 seems reasonable if you have a way to roughly verify their performance since the seller is not going to want bad feedback but I have found name brand NOS SMA attenuators on Ebay for less than that before.
 


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